Improvement in chimney-cowls



w. H. MYERS.

` Chimney Cowls. Y No. 137,561. ParemedApmsnss.

AM. PHoro-LlrnasMPme ca Mx (asaomve's rimossa) UNITED STATES PATENTGEEICE.

WILLIAM II. MYERS, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN cl-nlvnaEY-cowis.`

Specilication forming part of Letters Patent No. 137,561, dated April 8,1873; application filed l January 31, 1873.

To all whom it may concern:

Beit known that I, WILLIAM H. MYERS, of Philadelphia, Pennsylvania, haveinvented a certain Improved Chimney Cowl or Cap, of which the followingis a specification:

The nature of my invention consists in the i'orm and arrangement of avibrating valve pivoted to the two raised sides of a chimney. The valveis pivoted near its center and balanced so as to hang vertically when`there is no wind. The upper part of the valve above the. pivots presentsa greater surface to the wind than the lower part, so that the valve isforced over by the wind in a manner to prevent the wind blowing down thechimney. \Vhen the wind blows direct across the edge ot the valve theraised sides ot' the chimney prevent the downward draft.

Figure lis a perspective view of the cap from the rear, the quarter fromwhich the wind is blowing. Fig. 2 is a perspective view facing the wind.Fig. 3 is an end view of the valve in a brick chimney. y Fig. 4 is asection through thevalve and chimney on line m y. Fig. 5 shows a slightmodification in the cap.

The cap A I make rectangular, of sheet metal, with two of the sides, a',standing above the other two sides. A thin sheet-iron f valve, B, ispivoted in holes C in the raised heaviest, which keeps the valve in aperpenA dicular position when there is no wind to influence it. Thevalve is prevented from turn ing over too far by its lower edge comingin contact with the end of the cap or against the studs a.

The arrows O show the direction ofthe wind, and the arrows p the currentof smoke, gas, or foul air.

The exit of the smoke may be facilitated by flaring outward the edge ofthe cap, as at d, Fig. 5.

Brick chimneys are already built with the y raised sides H, Figs. 3 and4. I adapt my valve to them, as shown, by inserting a soapstone brick,h', drilled out so as to serve as a bearing for the'pivot. `IThesoap-stone prevents the creaking so objectionable about a cowl.

When the wind blows square across the chimney the valve hangsperpendicular, and the raised sides prevent the Wind blowing down. Assoon as it varies to either quarter the valve lies over, as shown in thedrawing, preventing the windfrom actingupon the current of smoke, exceptin the same direction only with itself.

I claim- The valve B pivotcd so as to tilt over by the pressure of thewind upon its upper surface, substantially as herein described, incombination with the raised sides a of the chimney. Y

IVM. H. MYERS.

Witnesses:

JAMEs E. COOKE, J oHN F. GRANT.

